13.8 kV selective high-resistance grounding system for a geothermal generating plant — A case study

2012 ◽  
Author(s):  
J. C. Das ◽  
Edmundo Perich
Keyword(s):  
High Resistance ◽  
Grounding System

Laser Based Analysis on Analog Circuits with Feedback Loops and a Case Study

2006 ◽  
Author(s):  
Fubin Zhang ◽  
David Maxwell
Keyword(s):  
Success Rate ◽  
High Resistance ◽  
Analog Circuits ◽  
Analog Circuit ◽  
Feedback Loops ◽  
Induced Voltage ◽  
Analog Device ◽  
Analog Ic ◽  
Successful Isolation

Abstract Based on the understanding of laser based techniques’ physics theory and the topology/structure of analog circuit systems with feedback loops, the propagation of laser induced voltage/current alteration inside the analog IC is evaluated. A setup connection scheme is proposed to monitor this voltage/current alteration to achieve a better success rate in finding the fail site or defect. Finally, a case of successful isolation of a high resistance via on an analog device is presented.

scholarly journals Investigation and Improvement of Standard External Lightning Protection System: Industrial Case Study

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4118
Author(s):  
I Made Yulistya Negara ◽  
Daniar Fahmi ◽  
Dimas Anton Asfani ◽  
IGN Satriyadi Hernanda ◽  
Rendi Bagus Pratama ◽  
...  
Keyword(s):  
Petrochemical Industry ◽  
Protection System ◽  
Lightning Protection ◽  
Industrial Case Study ◽  
Grounding System ◽  
Electromagnetic Transient ◽  
Petrochemical Company ◽  
Program Software ◽  
Ground Potential

In this study, the lightning protection system and grounding system of one plant of the petrochemical industry were investigated, evaluated, and improved. The methods used in this study were rolling sphere and angle protection methods. The grounding system of the building under study was modeled and simulated using ATP/EMTP (Alternative Transient Program/Electromagnetic Transient Program) software. The results show that the external lightning protection system of the prilling tower studied does not adhere to IEC 62305 and IEC 1024-1-1 standards. Moreover, the grounding configuration of the DCS building was not appropriate for protecting sensitive equipment inside. Lightning causes an enormous potential difference between lightning ground rods in the grounding system. Additionally, disabling the existing surge protective device (SPD) causes an increase in the magnitude of Ground Potential Rise at the DCS building. Improvement of the lightning protection system of the prilling tower and DCS building on Plant 1 of this petrochemical company as well as some other recommendations for improvements are proposed. This paper also shows evidence that external lightning protection, internal lightning protection, and the grounding system need to be connected to make an exemplary lightning protection system.

Installation of High Resistance Grounding System on the Ungrounded System at Offshore Platform

2021 ◽  
Author(s):  
Alvin Teo Tuan Lee ◽  
Pungut Ibrahim ◽  
Hoe Tung Yew ◽  
Mazlina Mamat ◽  
Nader Nassif Barsoum
Keyword(s):  
High Resistance ◽  
Offshore Platform ◽  
Grounding System

scholarly journals In Vivo Penicillin MIC Drift to Extremely High Resistance in Serotype 14 Streptococcus pneumoniae Persistently Colonizing the Nasopharynx of an Infant with Chronic Suppurative Lung Disease: a Case Study

2002 ◽  
Vol 46 (11) ◽  
pp. 3648-3649 ◽  
Author(s):  
Amanda J. Leach ◽  
Peter S. Morris ◽  
Heidi Smith-Vaughan ◽  
John D. Mathews
Keyword(s):  
Streptococcus Pneumoniae ◽  
Lung Disease ◽  
Chronic Bronchitis ◽  
High Resistance ◽  
Early Onset ◽  
Recurrent Pneumonia ◽  
First Report ◽  
Suppurative Lung Disease

ABSTRACT This is the first report of in vivo pneumococcal penicillin MIC drift from 4.0 to 16.0 mg/liter, possibly associated with alterations in the pbp1a gene. The case presented here is of an infant with early onset recurrent pneumonia and chronic bronchitis requiring repeated antibiotics.

A Study of SRAM Device Soft Failures Caused by Contact Volcano Defects Using Nanoprobing Analysis

2011 ◽  
Author(s):  
Yu Hsiang Shu ◽  
Vincent Huang ◽  
Chia Hsing Chao
Keyword(s):  
Failure Analysis ◽  
High Resistance ◽  
Ion Beam ◽  
Analysis Method ◽  
Root Cause ◽  
Parametric Data ◽  
Transmission Electron ◽  
Focus Ion Beam ◽  
Electrical Data

Abstract Using nanoprobing techniques to accomplish transistor parametric data has been reported as a method of failure analysis in nanometer scale defect. In this paper, we focus on how to identify the influence of Contact high resistance on device soft failures using nanoprobing analysis, and showing that the equivalent mathematical models could be used to describe the corresponding electrical data in a device with Contact high resistance issue. A case study was presented to verify that Contact volcano defect caused Contact high resistance issue, and this issue can be identified via physical failure analysis (PFA) method (e.g. Transmission Electron Microscope and Focus Ion Beam techniques) and nanoprobing analysis method. Finally, we would explain the physical root cause of Contact volcano issue.

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